In advance: If I had to choose, I also like the architect’s design the best.
I believe that the architect did
not place the technology there without ulterior motives, because in the end your budget will run out for the house.
I wanted 2 full floors, an (unfinished, possibly prepared) attic, a basement, all on about 100 sqm footprint (160 sqm + 80 sqm basement), a (solid?) double garage and your budget is 350,000 EUR? I don’t really see that yet, especially if the incidental building costs are also included in that. (350 - 50 = 300 => 1250 Euro/sqm) ... nada... and especially not in BW.
I want to predict and guess:
a) the basement will be dropped.
b) the garage will be a precast concrete garage or a carport.
Keep in mind that a house without a basement especially needs storage space!!! Garage +1m and HTR not less than 10 or 12 sqm. Attic accessible with space-saving stairs (not folding stairs!) and within the insulated envelope!!!
If there is still money somewhere... see attachment. (Warning, stairs shifted, so the upper floor plan dies! Anyway, it all only makes sense as a whole. A ground floor without an upper floor is not a ground floor.
